-62.01% is the change from 637 to 242
Calculation steps:
[( 242 - 637 ) ÷ 637] x 100 = -62.01%
Formula
Percentage change = [(242 - 637) / 637] x 100
Subtract the new number by the original number
242 - 637 = -395
-395 ÷ 637 = -0.6200941915227629
-0.6200941915227629 x 100 = -62.01%